Drumhead.



PATBNTBD JUNE 2 w. II. HBYBECK.

DRUMHEAD.

APPLICATION FILED JULY 2s, 1902.

NO M ODEL.

Tf. .om PEYERS Co. PHDTO-LITHQ. WASHINGTON, n c.

UNITED STATES Patented June 2, 1903.

PATENT -OEFICE WILLIAM H. HEYBEOK, OF PITTSBURG, PENNSYLVANIA, ASSIGNOR,BY DIRECT AND MESNE ASSIGNMENTS, OF TWO-THIRDS TO FRANK B. DAWSON, OFMCKEESPORT, PENNSYLVANIA, AND Jf'L. B. DAWSON, OF BEAVERFALLS,PENNSYLVANIA.

DRUMHEAD.

SPECIFICATION forming part of Letters Patent No.. 729,936, dated June2,1903.

Application filed July 28, 1902. Serial No. 117,324. (No model.)

To a/ZZ whom it may concern:

Be it known that I, WILLIAM H. HEYBECK, a citizen of the United Statesof America, residing at Pittsburg, in the county of Allef gheny andState of Pennsylvania,have invented certain new and useful Improvementsin Dru mheads, of which the following is a speciiication, referencebeing had therein to the accompanying drawings.

This invention relates to certain new and useful improvements in headsfor drums and similar instruments; and the primary object thereof is toprovide a drumhead which is produced by chemicallyV treating fabric.

Broadly, the invention comprises one or more thicknesses of Wovenfabric-such as silk, satin, linen, te-which are gummed together andtreated on their outer faces with a stiffening composition composed ofshellac, mercury, oxalic acid, and salt.

In describing the invention in detail reference is had to theaccompanying drawings, forming a part of this specification, and

wherein like numerals of reference indicatelike parts throughout theseveral views, in whichp Figure l is a fragmentary vertical section of adrum provided with heads constructed in accordance with the presentinvention. Fig. 2 is a section of the snare-head, or modified form of mydevice.

desired construction, inasmuch as they do not form any part of thepresent invention.

My invention, as heretoforestated, consists entirely in the constructionof the respective drumheads, which, as will appear in the followingdescription, are very similar.

Fig. 3 is a similar view of the batter-head, or preferred form of Inconstructing the batter-head I employ two thicknesses or layers offabric (indicated Vby the reference-numeral 6) and which are gummed ontheir innerfaces, as at 7. 8 indicates layers of stiffeningcomposition,which are placed on the outer faces of the respectivethicknesses of fabric. As shown in Figs. 4, 5, and 6, the Warp and weftthreads of thickness of cloth are angularly disposed to the warp andweft threads of the two thicknesses of cloth and are arranged at anangle to each dients are rst thoroughly mixed andv then spreadon thefabric and allowed to dry. After drying for a short period the drumheadis steamed, thereby drawing out the vmercury andhardening'thecomposition.

.Bythe' employment of va drumhead constructed in accordance with thepresent invention much softer and sharper tones lare produced than canbe obtained from the ordi- ,nary gut heads.

WILLIAM II. IIEYBECII.

Witnesses:

JOHN NOLAND, E. E. POTTER.

